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@minimiza OSGOOD,` PLUMMER, `OF WORCESTER, MASSACHUSETTS.

Lettersldatent No. 97,959, dated December 14. 1869.

MECHANICAL MovEMEN'r.

The` Schedule referred to in these Letters Patent and making part of the same.

To all lwhom it may concern Be it known that L'OseoonflELUiuMEn, of the city and `county of Vorcester, and Commonwealth of Massachusetts, `have invented a certain new and useful -Mechanical Movement and .I do hereby declare that -the following isa full, clear, and exact description of the saine, reference being had to the accompanying drawings, forming a. part of4 this specication, in

whichy l v i A,Figurel represents a vertical section of the ina-l chine to which the mechanical movement is attached Figure 2 represents `a similariview, showing the `movement in a different position.

' To enable `those skilled in the art to which my invention belongs, to make and use the same, I will pro c eed to describe it more i n detail. `The nature of my invention consists ina new mechanical movement7 as hereafter explained.

To timeframe A are attached bearings-'13, which supporta crank-shaft, C, the crank D of which is connected to 4thel upper end of` the arm a, of the belli crank F, by the hinge-connection or pitman E.

The bell-crank Fl is hinged 'at b to the piece G which, in turn, is hinged at c to the frame A.

, The horizontal arm d, ofthe'bell-crank F, is providedwith avstud or wrist, which is fitted to work in fthe groove eof the rack-piece H, which is hinged upon the same journal, c, as the piece G.

The slotted rack-piece H is `provided with small cogs, f, which mesh with thecogs g, of the wheel I,

secured to 4a journal, J, -which is properly supported by andfturns in ,bearings` fastened to the frame A,

whereby the, slotted rack-piece H can he swungon its fnlcrumrc, so as to occupy different positions, as indicated in the drawings.

The groove e, from the` point l to 2isforined in the arcofa circle, of which the journal c is the centre,

while that part ofthe slot from 2 to 3 is formed in the` arc of a circle, of' which the pivot or journal b is the centre. i i

. :i From the foregoing description it will be seen that when the slotted rack-piece H is turned back, as

shownin iig. 2, so that the point 2 will not be passed by the stud or` wrist in the end of the arm d, when the crank D is at its extreme point of `throw on the right,`the hinged upright piece G, together 4with the piece K, fastened to its upper end, will be vibrated i back and forth upon the journal c, with the same extent of motion as would be the case if the arm a were rigidly fastened to the pieces` G and K; while, if the rack-piece H is moved forward, so as to allow the `stud or wrist inthe `end of the arm (l to pass down `in the slot e, 4below the point 2, the motion of theV pieces G and K will stop as soon as the stud or pin passes the point 2, and said pieces will remain at rest and stationary, until the wrist is thrown back above the point 2, by the action of the crank D and the connection or pitman E. i

`An illustration of the above is shown inv full and v dotted lines in iig. l.

The pieces G K and bell-crank F are show n in full lilies, they appear when crank D is moved to its extreme point oi' motion on the left, while the parts GK are-shown in dotted lines atl the point where i they stop, until the bell-crank E has been rocked for ward on its fulcrum b, and back to the position which it occupied when the stud or wrist, in the end of the arm d, passed below the point 2.

Ifr the rack-piece H is moved so i'ar forward thatl the wrist or pin -in the end of the arm d does not rise in 4the slot e above the point 2, the parts G and K will not be moved or vihrated at all;`(the bell-crank E simply rocks on the journal b;) but as soon as the rackpiece H is moved back sufficiently to throw the stud or wrist, in the endof arm (l,- above the point 2, then motion wlLbe imparted to the piece G, andsaid motion will be increased as the rack-piece is moved hack', until the entire motion of crank D is imparted to the 4 piece G.

It will be seen that by the use of my new me.,-l chanical movement, the entire, or any part ofthe mo- 'tion of a crank can be used, andl that, too, without stopping the crank, while vat the` same time the parts which stopror remain at rest4 duringj the timegthe crank is completing its motion are held. rigidly fin place.

My new mechanical movement may be applied to a great many different purposes,andstherefore I do not limit myself to the application thereof to any partielllar purpose. j It can be applied to a lgood advantage in the operation of the lay ofa loom, as illustrated in the drawings, K being the lay supported 'by pieces or legs G, journaled to the sides of the loomframe at c.

- Inthis application, the device shown in the' drawings should `be applied at each side of the loomfraine, the shaft J extending from side to side, soY Ythat both of the rack-pieces H can be operated sininl taneously.

As thus applied, it will be seen that a dwell of the lay, of any desired length, can be obtained during 4the back sweep of the crank D, thus rendering my mechanical movement of great utility in broad looms especially, as will be understood -by those skilled in the art of weaving. i

The rack-pieces H may be retained in any desired `adjusted position by set-screws or bolts 4:, or in any other suitable manner. v

The slot eA may be so varied as to give any desired tion,

motion, and which can be produced by making the Also, the combination of the slotted rack-piece H, slot e eccentric to the centres b and c. in' combination with the bell-crank piece F, substan- Having described my device for transmitting inotially asdescribed.

' OSGOOD PLUMMER.

What I claim therein as new, and of my invention,

:md desire to secure by Letters Patent, is- Witnesses:

The mechanical movement, substantially as above Trios. E. DODGE, described. ALBERT E. PELRCE. 

